61690454400 has 192 divisors, whose sum is σ = 203438653200. Its totient is φ = 16430899200.

The previous prime is 61690454383. The next prime is 61690454411. The reversal of 61690454400 is 445409616.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9030186 + ... + 9037014.

Almost surely, 2^61690454400 is an apocalyptic number.

61690454400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61690454400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101719326600).

61690454400 is an abundant number, since it is smaller than the sum of its proper divisors (141748198800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61690454400 is a wasteful number, since it uses less digits than its factorization.

61690454400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7797 (or 7780 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 61690454400 in words is "sixty-one billion, six hundred ninety million, four hundred fifty-four thousand, four hundred".